import pandas as pd
data = pd.read_excel('F:\\python\\第7章\\销售表.xlsx', sheet_name=0)
print(data['销售数量'].sum())
print(data['销售数量'].mean())
print(data['销售数量'].max())
print(data['销售数量'].min())
print(data['销售日期'].count())
print(data['产品名称'].nunique())
